Signal box fault board, North Eastern Railway, disc, oval, reversible, black with white border/white with black border. Signal box fault board
Headcode disc, for class 76 and class 77 locomotives, with integral lens holder, c1954. Headcode disc 1954
Headcode disc, for Class 76 and Class 77 locomotives, with integral lens holder, red (tail) version, c. 1954. Headcode disc 1954